Multiple Choice
Which of the following infectious diseases confers no protection from reinfection after exposure?
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1. Introduction to Microbiology
Introduction to Microbiology
Multiple Choice
What is the primary purpose of using an LB agar plate in microbiology laboratories?
A
To provide nutrients and a solid surface for bacterial growth
B
To detect the presence of viral particles in a sample
C
To selectively inhibit the growth of Gram-positive bacteria
D
To measure the oxygen consumption of microorganisms
Verified step by step guidance1
Understand that LB agar plates are a common growth medium used in microbiology laboratories primarily for culturing bacteria.
Recognize that LB stands for Luria-Bertani, which is a nutrient-rich medium designed to support the growth of a wide variety of bacteria by providing essential nutrients such as peptides, vitamins, and minerals.
Note that the agar component solidifies the medium, creating a firm surface that allows individual bacterial colonies to grow and be easily observed and isolated.
Eliminate options that do not align with the function of LB agar plates: detecting viral particles, selective inhibition of Gram-positive bacteria, or measuring oxygen consumption are not primary purposes of LB agar.
Conclude that the primary purpose of using an LB agar plate is to provide both nutrients and a solid surface to support and observe bacterial growth.
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